Warp stop mechanism for looms



Feb. 3, 1925.

B D L. ELLISON WARP STOP MECHANISM FOR LOOMS Filed April 16. 1924 T m V W ATTORNFY aerate B D LENHABT ELLISON, OF EASLEY. SOUTH CAROLINA, ASSIGNOR DRAPER COR- PORATI ON. OF HOPEDALE, MASSACHUSETTS. A CORQRATISFN 0F MAINE.

TARP STOP JHIECHAIIISM F03 LOOIVIS.

Application filed. April 16, 1924.

To all whom it may concern.

Be it known that I, B D LENHART ELLI- soN. a citizen of the United States, residing at Easley, in the county of Pickens and State of South Carolina, have invented an Improvement in l/Varp Stop Mechanisms for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to warp stop mechanisms for looms whereby the operation of the loom is arrested when a warp thread breaks or becomes too slack for weaving purposes.

As now ordinarily constructed warp stop mechanisms are provided with a series of drop wires'which are normally supported by the warp threads during weaving, and associated with the drop wires in a drop wire guide for directing the movement of the drop wires. A feeler or vibrator is usually associated with the above stated parts of the stop mechanism, and when its movement is arrested by one of the drop wires which fails to be supported by a warp thread, the loom is stopped through a train of mechanism ofany usual construction.

It is sometimes desirable to remove the drop wire guides and drop wires without disassociating these parts, and heretofore the ends of the drop wire guides have been supported in slots formed in the bracket at each side of the loom and from which the drop wire guides might be readily removed. During the Weaving operation, however, when the shed is changed, the drop wire guides are subject to movement in their end bearings, with the result that the ends of the drop wire guides wear rapidly.

Therefore, while it is desirable to support the drop wire guides so that they may be readily removed, it is also of importance to maintain the drop wire guides in their supports without movement during the change of the shed, and one of the objects of the present invention is the provision of means for holding the drop wire guides in their bearings so that they will not be moved during weaving, and yet be readily removable when desired.

An important feature of the present invention, therefore, consists in end supports for thedrop wire guides and a retainer which-is movable into engagement with the Serial No. 706,873.

ends of the drop wire guides to hold them immovably in their supports and which is also movable from its operative position to permit'removal of the drop wire guides when desired.

The invention, novel features, and new combination of parts will best be made clear from the following description and the accompanying drawings of one good form of the invention.

In the drawings:

Fig. 1 is a perspective view of the main portions of a warp stop mechanism with the drop wires removed for better illustration of the parts;

Fig. 2 is a cross-section of'the warp stop mechanism showing the drop wires and drop wire guides, and the retainer; and

Fig. 3 is a plan view of the warp stop mechanism at one end thereof.

It has not been deemed necessary herein to show and describe the transmission mechanism for efiecting loom stoppage when the feeler or vibrator is arrested by a drop wire, since such mechanism is now well understood and the details thereof form no essential part of the present invention.

As each side of the loom frame 1 is a bracket 2 which may be of suitable construction to sustain the main proportions of the warp stop mechanism. The warp stop mechanism proper comprises the end supports. 3 from each of which extends an arm 1 having a slot 5 through which passes a bolt 6 for securing the support 3 to its adjacent bracket 2. In the present instance, each bracket 2 is provided with a slot 7 which may afford a con venient means for adjusting the position of the warp stop mechanism or the end supports.

Extending between the end supports 3 are the bars 8 which in some cases may constitute the warp supporting bars, and the ends of these bars 8 are secured to the end brackets 3.

Extending between the end brackets 3 is the rock shaft 9having an arm 10 to which is connected a link 11 pivoted at 12 to a feeler carrier 13. The feeler carrier 13 is provided with the feelers 14, and is itself supported for movement relative to the Warp stop mechanism by the undersupports 15. The rock shaft 9 is actuated through anarm 16 and the link 17 whichjextends to an actuating part of the loom of ordinary construction well. understood and not herein shown because its details form no part of the present invention.

The rock shaft 9 is connected to the arm 16 by means of a spring 18, Fig. 1, one end of the spring being secured to a collar 19 and the other end to the hub portion 20 of the arm 16, the construction being such that should one of the feelers 1% be arrested by a drop wire, the yielding action of the rock shaft with its actuating means will constitute a giveway device, as usual.

The rock shaft 9 has secured thereto an arm 21 to which is connected a rod 22 which constitutes one element of a transmission mechanism for effecting loom stoppage whenever the rock shaft 9 is arrested in its rocking movement by the arrest of a feeler. In the present instance the feeler carrier is shown as having the two feelers 14, but of course any desired number of feelers may be employed.

Extending between the side brackets 3 are the drop wire guides 23 the ends of which are supported in openings or sockets formed in the end supports 3. The drop wires 24-. are shown in the present instance as provided with eyes through which passes a warp thread. and between the drop wires 24lare the warp supporting bars 26.

The drop wires 2t, in the present instance, are shown as provided with elongated slots 27 through which passes a drop wire guide. There may be any number of banks or rows of drop wires 24, but in the present instance three are shown. and through the alined drop wires 24 one of the drop wire guides 23 extends, as indicated in Fig. 2. The parts so far described may be substantially of usual construction and the details thereof need no further explanation.

During weaving when the shed is changed a tension will be placed on some of the warp threads tending to lift some of the drop wire guides, and depress other drop wire guides. The tendency of this alternate stress upon the drop wires is to move the drop wire guides in their end supports in which they have heretofore been mounted with freedom of movement.

In accordance with the present invention, the drop wires are held in their supports immovably; i. e., they are not subject to being moved by the warp threads during the formation of the shed, and consequently the ends of the drop wire guides are protected from wear. The present invention further contemplates that the drop wire guides shall be removable from their supports when desired, as, for instance, in changing the warp, and to this end the means for holding the drop wire guides in their supports is formed as a retainer pivotally mounted on the end supports, or

one of them, for holding the drop wire guides in position.

In the present instance of the invention, as indicated in Fig. 1. the ends of the drop wire guides extend into recesses or openings 28 in the end supports 3 and hinged to each of the end supports 3 is a retainer 29 which may he moved to a holding or operative position above the ends of the drop wire guides or be removed from operative position to permit removal of the drop wire guides.

in the present instance, the retainer 29 is connected to its adjacent support 3 by a hinge 30 of any approved character and preferably so formed that the retainer 29 may be moved to and from its operative position over the ends of the drop wire guides by a swinging movement towards and from the side of the loom, and, as shown. in a vertical. plane. This swinging movement of the retainer 29 is desirable because it permits the drop wires themes to be positioned close up to the ends of the drop wire guides without inter-fer ing with the movement of the retainer to and from operative position.

In the present instance of the invention it will be noted that the ends of. the drop wire guides 23 extend slightly above the top surfaces of the side supporting brackets 23 when the drop wire guides are in their supporting position. As shown, under ghese circumstanc each of the retainers 29 is provided with one or more slots or recesses 31 in accordance with the number of drop wire guides employed. so that when the retainer is in. operative position the end portion of the drop wire guides may be seated in the recess or recesses of the retainer.

ltarh irtainer 29 is provided with means for holding it in its guide bar retaining position. In the present instance this means shown as one or more bolts 32 which pass through the retainer 29 and may be threaded into the side supports 3, as indicated in Fig. 2.

The bolts constitute one good form of means for securing the retainers 29 in place over the ends of the drop wire guides, but the intention. of course, is not restricted to the particulars or details in this respect.

hen the drop wire guides 23 with the drop wires 24t thereon are in operative position. as indicated in the drawings, the ends of the drop wire guides extend into the slots formed in the side supports 3 and the retainers 29 are moved on their hinge connection with the side supports into overlying relation relative to the ends of the drop wire guides and are secured in this position, so that thereafter and during Weaving the drop Wire guides are held from movement. Should it be desired, however, to remove the drop wire guides along with the drop wires, or to remove the drop wires from the drop wire guides, it is only nec essary to release the retainer holding means, such as the screw bolts 32, whereupon the retainers may be thrown upwardly and outwardly, as indicated at the left of Fig. 1, to thereby permit the ready removal of the drop wire guides.

In the present instance of the invention, a retainer is shown as connected to each one of the side supports 3, but in some cases it may be suiiicient to form a retainer at one side only, in which case the other end of the drop wire guide may be supported in a closed slot formed in the other bracket or support.

lVhat is claimed is:

1. In a warp stop mechanism for looms, the combination of a. series of drop wires normally supported by the warp threads during weaving, a drop wire guide for guiding the drop wires, supports at the side of the loom having drop wire guide receiving sockets extending into the support part way through its transverse dimension for supporting the ends of the drop wire guide, a retainer having a recess or socket extending part way through its tranverse dimension to deceive the end of a drop wire guide, and

means for securing the retainer in operativeposition with the end of the drop wire eX- tending into the recess of the retainer.

2. In a warp stop mechanism for looms, the combination of a. series of drop wires. normally supported by the warp threads during weaving, a drop wire guide for guiding the drop wires, supports at the side of the loom having drop wire guide receiv ing sockets closed at their outer ends for supporting the ends of the drop wire guide and maintain it from endwise movement in either direction, a drop wire guide retainer mounted for swinging movement to and from a position above the ends of the drop wire guide and having sockets closed at their outer ends for holding the drop wire guide in the support.

3. In a warp stop mechanism for looms, the combination of a series of drop wires normally supported by the warp threads during weaving, a drop wire guide for guiding the drop wires, supports at the side of the loom formed with drop wire guide receiving sockets closed at their outer ends for sup porting the ends of the drop wire guide from endwise. movement, a drop wire guide retainer having a socket closed at its outer end and hinged to the supports for swing ing movement in a vertical plane in a direction transversely of the loom to and from a position above the end of a drop wire guide, and means for securing the retainer in operative position.

4. In a warp stop mechanism for looms, the combination of a support at each side of the loom, each having a drop wire guide retainer hinge to swing in a plane transversely of the loom to and from operative position, the said supports and the retainers having a drop wire guide receiving socket formed partly in the supports and partly in the retainers and closed at its outer end, and a drop wire guide the ends of which are enclosed by said receiving socket, and bolts located between the sockets for securing the retainers in place.

A. warp stop mechanism for looms, comprising, in combination, a support at each side of the loom having transverse sockets extending part way through the support, guides having end portions extending into said closed slots, a guide retainer hav ing similar transverse sockets closed at their outer ends and hinged to a support at one side of the loom constructed and arranged to overlie the ends of the guides and prevent them from movement during weaving and movable on its hinge connection outwardly to permit ready removal of the guides, and means located between the sockets in the supports and retainers for clamping the retainer in overlying relation with the ends of the guides.

In testimony whereof, I have signed my name to this specification.

B D LENHART ELLISON. 

